<!DOCTYPE html>
<html>
<head lang="en">
    <meta charset="UTF-8">
    <title>图片</title>
    <meta name="viewport"
          content="width=device-width, user-scalable=no, initial-scale=1.0, maximum-scale=1.0, minimum-scale=1.0"/>
    <link rel="stylesheet" href="css/bootstrap.min.css"/>
    <style>
        body {
            padding: 20px;
        }
        img{
            width: 200px;
            height: 200px;
        }
    </style>
</head>
	<body>
		<img src="img/demo12-1.jpg" class="img-rounded" alt=""/>
		<img src="img/demo12-1.jpg" class="img-circle" alt=""/>
		<img src="img/demo12-1.jpg" class="img-thumbnail" alt="" />
	</body>
</html>
